Calculating-machine.



H. CORDT.

CALCULATING MACHINE.

APPLICATION FIL'ED DEC. 30.1912.

1,158,374. Patented Oct. 26, 1915.

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. CALCULATING-MACHINE.

1' b all whom it may concern): r Be it known thatlI, Hose GORDT, a subject ofthe Grand Duke of Oldenburg, re-

Oldenburg, Germanyphave invented certain new and useful improvements in Q/alculat ing-Machines; of which the follow ng 1s a specification;

There have already become known cal culating machine system Thomas inwhich the stepped transfer cylinders are arranged vertically for example by Swiss'latent No.- .51306, class 68 of l909. Machines of this type present the inconvenience that they require much space and further that it is not possible-to execute all kinds of calculating operations if the, device for preventing the numeral disks from being overthrown is provided. I a

According to this invention cylindrical -numeral disks are keyed upon horizontal shafts arranged under the plate of the adding mechanism, The reversing sleeves for throwingin or out of gear the adding or the subtracting mechanism or vice versa are arranged between said horizontal shafts for the numeral disks and the shafts ofthc vertical toothed cylinders. Through this arrangement; the construction of the mav chine is much simplified so that it requires little space and nevertheless permits of executing all kinds of calculat1ngoperations, the numeral disks being insured against overthrowing.

The invention further consists in making the toothed cylinders comparatively short and in arranging the same in two superposed rows, the cylinders of the upper row standing opposite the interval between the cylinders of the lower rows The receiving wheels are controlledby movable forksfixed to movable sleeves, said sleeves being moved from the keys by means of a pivotable lever upon which act the spring controlled keys when they are depressed; 1 In the accompanying drawings the in vention is shown by way of example Figure 1 is a vertical section through the calculating apparatus. Fig. 2 is a section on the line II of Fig. 1. Fig. 3 shows a cylinder meshing with its receiving wheel.

a As can be seen from Fig. ,1 the stepped toothed cylinders aaare arranged in two superposed rows so that the cylinders of the v Specification dr rettr's Patent. 7 tp t wd gm; g gg ng Application filedli ecernbpr30,191.2.v seriaiivo. 739,245. H i

upper row i stand opposite the interval betweentwo cylinders of the lower row. The

vertical shafts?) of said cylinders stand at siding at Nordenham, Grand Duchy of small distances apart. The counting mechanism comprises the product mechanism as s raf s} Persia"? i v meansgof a convenient transmission which" drives the horizontal shafts d. carrying drum like'numeral disks e;-, The receiving wheels 9 are mounted upon vertical shafts f and they, can be displaced with regard to the toothed cylinders aa by means of a.

transmission mechanism which will be more particularly described hereinafter. 5

After-the receiving wheelshave been ad justed the transfer. is effected by turning the crank of a shaft h, the revolving motion of the shafts 7" being transferred to the hori- In'order to properly adjustthe receiving Wheels 9 upon their shafts f, forks 2 are arranged which engage with said receiving wheels 9 and are fixed to sleeves Z. These sleeves Z can move alongvertical rods 3 and they have each a stud 4 upon which the fork-shaped end 5 of a two-armedlever 7 is pivoted which is pivotally mounted upon a pin 6. The other end 8 of the two-armed lever 7 bears against the middle of a lever n'pivotally mounted upon a pivot pin on. Over said lever 'n, keys 0 are arranged which are controlled by springs 39 andhave conical pieces 9 adapted to engage with openings 9' horizontal shafts or upon the vertical shafts.

of a bar .9. This bar can be displaced in longitudinal direction spring 25. a I

Under the window of the casing the indicating numeral disks in are revolublymountand it is controlled by a ed upon pins 1), they have each a, toothed wheel u which meshes with the toothed part w of a rod 9 fixed upon the corresponding transfer sleeve i.

. The bars 8 have arms 2 in front of which a rod y is movably mounted in the casing 60 to the quotient mechanism beingieifected by i adapted to be displaced from the shaft It or from the crank handle by means of a convenient transmission gear.

Owing to the lever 7 arranged between the lever n and the sleeves z the strokes of the keys are almost uniform independently of the greater or lesser distance of the keys from the pivot pin m. This effect is further insured by providing in the lever n corresponding cavities for the ends of the keys.

The apparatus operates as follows :-On the depression of a key the corresponding sleeve Z is displaced upon the rod 3 according to the distance between the key and the pivot pin m of the lever n and according to the distance between the key and the pin 8 of the lever'7, whereby the receiving wheel 9 is displaced with regard to its toothed cylinder a or (4 At the same time the bar s has been moved to the right according to the conicity of the conical piece 9 (Fig. 1) and as soon as the conical piece (1 has passed through the corresponding opening of the bar 8 the spring t pulls the bar back so that the depressedkey is locked in the lowered position. When the transfer of the num ber upon the counting mechanism has been effected by turning the shaft h the rod 3 which stands perpendicular to the bars 8 is displaced so that the openings of the bar .9 are brought into register with the corresponding conical pieces and the depressed key can return to its normal position through the action of its spring 75. The de pressed keys go back to their normal position at the end of the transfer operation.-

WVhen a key is being depressed the numeral disk 20 is turned through the intermediary of the sleeve Z by means of the rod 9 so that the corresponding number appears in the window.

The transfer mechanism for the tenth Wheels can be of any well known type and it therefore has not been shown in the drawing.

The numeral disks are preferably provided with a milled rim 1) to facilitate the manipulation.

I claim 1. In a calculating machine the combination with number disks mounted on hori zontal shafts below the bottom plate of the calculating mechanism have reversing sleeves and toothed stepped transfer cylin- 'ders situated under said reversing sleeves and arranged in two superposed rows the cylinders of the upper row standing opposite the intervals between two adjacent cylinders of the lower row, substantially as described and shown and for the purpose set forth.

2. In a calculating machine the stepped toothed transfer cylinders having short steps and being arranged in two superposed rows so that the cylinders of the upper row stand opposite the intervals between two cylinders of the lower row whereby the size of the machine is considerably reduced, substantially as described and shown and for the purpose set forth.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

HUGO CORDT. l/Vitnesses:

WM. S'rnUss, F. TIEMANN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

